WO2018203650A1 - Procédé et appareil d'attribution de ressources dans un système de communication sans fil - Google Patents

Procédé et appareil d'attribution de ressources dans un système de communication sans fil Download PDF

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Publication number
WO2018203650A1
WO2018203650A1 PCT/KR2018/005067 KR2018005067W WO2018203650A1 WO 2018203650 A1 WO2018203650 A1 WO 2018203650A1 KR 2018005067 W KR2018005067 W KR 2018005067W WO 2018203650 A1 WO2018203650 A1 WO 2018203650A1
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Prior art keywords
rate matching
slot
resource
pattern
scheduling
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PCT/KR2018/005067
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English (en)
Korean (ko)
Inventor
이윤정
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엘지전자 주식회사
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Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to CN201880032813.5A priority Critical patent/CN110651522B/zh
Priority to KR1020197032193A priority patent/KR102234254B1/ko
Priority to JP2019560253A priority patent/JP6883118B2/ja
Priority to US16/609,731 priority patent/US10951377B2/en
Priority to EP18794613.2A priority patent/EP3606235B1/fr
Publication of WO2018203650A1 publication Critical patent/WO2018203650A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H04L1/0013—Rate matching, e.g. puncturing or repetition of code symbols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Definitions

  • the present invention relates to wireless communication, and more particularly, to a method and apparatus for allocating resources in a wireless communication system.
  • 3rd generation partnership project (3GPP) long-term evolution (LTE) is a technology for enabling high-speed packet communication. Many approaches have been proposed to reduce the cost, improve service quality, expand coverage, and increase system capacity for LTE targets. 3GPP LTE is a high level requirement that requires cost per bit, improved service usability, flexible use of frequency bands, simple structure, open interface and proper power consumption of terminals.
  • next-generation communication which considers reliability and delay-sensitive services / terminals (UEs).
  • NR new radio access technology
  • the wavelength is shortened, and thus a plurality of antennas may be installed in the same area.
  • the wavelength is 1 cm, and a total of 100 antenna elements may be installed in a two-dimensional array in a 0.5 ⁇ (wavelength) interval on a panel of 5 ⁇ 5 cm 2. Therefore, in the mmW band, a plurality of antenna elements are used to increase the beamforming gain to increase coverage or to increase throughput.
  • Hybrid beamforming with B transceivers which is less than Q antenna elements, may be considered as an intermediate form between digital beamforming and analog beamforming.
  • the directions of beams that can be simultaneously transmitted are limited to B or less.
  • the structure and / or related features of the physical channel of the NR may differ from existing LTE.
  • various schemes can be proposed.
  • the present invention provides a method and apparatus for allocating resources in a wireless communication system.
  • the present invention discusses resource allocation and downlink control information (DCI) design in consideration of bandwidth coordination and wideband / narrowband operation in NR. More specifically, the present invention specifically discusses rate matching in NR.
  • DCI downlink control information
  • a method of performing rate matching by a user equipment (UE) in a wireless communication system receives UE-specifically or cell-specifically a configuration for the rate matching, if the configuration is received UE-specifically, performs the rate matching only on unicast data, and the configuration is cell-specifically received. If so, it includes performing the rate matching on the unicast data and broadcast data.
  • UE user equipment
  • a user equipment (UE) in a wireless communication system includes a memory, a transceiver, and a processor connected to the memory and the transceiver, wherein the processor controls the transceiver to receive UE-specific or cell-specific configuration for rate matching.
  • the rate matching is performed on unicast data only, and when the configuration is received cell-specifically, the rate matching is performed on the unicast data and broadcast data.
  • Rate matching in NR can be performed efficiently.
  • 1 shows an NG-RAN architecture.
  • FIG. 2 shows an example of a subframe structure in NR.
  • 3 shows a time-frequency structure of an SS block.
  • FIG. 4 shows an example of a system bandwidth and a bandwidth supported by the UE in an NR carrier.
  • 5 shows an example of carrier combining.
  • FIG 6 shows an example in which LTE-NR coexists according to an embodiment of the present invention.
  • FIG. 7 illustrates an example of a rate matching pattern according to an embodiment of the present invention.
  • FIG 8 shows another example of a rate matching pattern according to an embodiment of the present invention.
  • FIG 10 shows another example of rate matching according to an embodiment of the present invention.
  • FIG. 11 illustrates a method in which a UE performs rate matching according to an embodiment of the present invention.
  • FIG. 12 illustrates a wireless communication system in which an embodiment of the present invention is implemented.
  • FIG. 13 shows a processor of the UE shown in FIG. 12.
  • the present invention will be described based on a new radio access technology (NR) based wireless communication system.
  • NR new radio access technology
  • the present invention is not limited thereto, and the present invention may be applied to other wireless communication systems having the same features described below, for example, 3rd generation partnership project (3GPP) long-term evolution (LTE) / LTE-A (advanced) or It can also be applied to the Institute of Electrical and Electronics Engineers (IEEE).
  • 3GPP 3rd generation partnership project
  • LTE long-term evolution
  • LTE-A advanced LTE-A
  • IEEE Institute of Electrical and Electronics Engineers
  • the 5G system is a 3GPP system composed of a 5G access network (AN), a 5G core network (CN), and a user equipment (UE).
  • the UE may be called in other terms such as mobile station (MS), user terminal (UT), subscriber station (SS), wireless device (wireless device), and the like.
  • the 5G AN is an access network including a non-3GPP access network and / or a new generation radio access network (NG-RAN) connected to the 5G CN.
  • NG-RAN is a radio access network that has a common characteristic of being connected to a 5G CN and supports one or more of the following options.
  • NR is an anchor with E-UTRA extension.
  • E-UTRA is an anchor with NR extension.
  • the NG-RAN includes one or more NG-RAN nodes.
  • the NG-RAN node includes one or more gNBs and / or one or more ng-eNBs.
  • gNB / ng-eNB may be referred to in other terms, such as a base station (BS), an access point.
  • the gNB provides NR user plane and control plane protocol termination towards the UE.
  • the ng-eNB provides E-UTRA user plane and control plane protocol termination towards the UE.
  • gNB and ng-eNB are interconnected via an Xn interface.
  • gNB and ng-eNB are connected to 5G CN via NG interface. More specifically, gNB and ng-eNB are connected to an access and mobility management function (AMF) through an NG-C interface, and to a user plane function (UPF) through an NG-U interface.
  • AMF access and mobility management function
  • UPF user plane function
  • gNB and / or ng-eNB provides the following functions.
  • Radio resource management dynamic allocation (scheduling) of resources for the UE in radio bearer control, radio admission control, connection mobility control, uplink and downlink;
  • IP Internet protocol
  • QoS Quality of service
  • NAS non-access stratum
  • AMF provides the following main functions.
  • Idle mode UE reachability (including control and execution of paging retransmission);
  • SMF session management function
  • Anchor points for intra / inter-radio access technology (RAT) mobility (if applicable);
  • PDU protocol data unit
  • Uplink classification to support traffic flow routing to the data network
  • QoS processing for the user plane eg packet filtering, gating, UL / DL charge enforcement
  • Uplink traffic verification QoS flow mapping in service data flow (SDF)
  • SMF provides the following main functions.
  • Control plane part of policy enforcement and QoS
  • a plurality of orthogonal frequency division multiplexing (OFDM) numerology may be supported.
  • Each of the plurality of neuralologies may be mapped to different subcarrier spacings.
  • a plurality of neuralologies that map to various subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may be supported.
  • Downlink (DL) transmission and uplink (UL) transmission in NR are configured within a 10 ms long frame.
  • One frame consists of 10 subframes of length 1ms.
  • Each frame is divided into two equally sized half-frames, half-frame 0 consists of subframes 0-4, and half-frame 1 consists of subframes 5-9.
  • On the carrier there is one frame set in the UL and one frame set in the DL.
  • Slots are configured for each numerology in a subframe. For example, in a neuralology mapped to a subcarrier spacing of 15 kHz, one subframe includes one slot. One subframe includes two slots in the neuralology mapped to a subcarrier spacing of 30 kHz. In a neuralology mapped to a subcarrier spacing of 60 kHz, one subframe includes four slots. One subframe includes eight slots in a neuralology mapped to a subcarrier spacing of 120 kHz. In the neuralology mapped to the subcarrier spacing 240 kHz, one subframe includes 16 slots. The number of OFDM symbols per slot may be kept constant. The starting point of the slot in the subframe may be aligned in time with the starting point of the OFDM symbol in the same subframe.
  • An OFDM symbol in a slot may be classified as a DL symbol, an UL symbol, or a flexible symbol.
  • the UE may assume that DL transmission occurs only in DL symbol or floating symbol.
  • the UE may perform UL transmission only in the UL symbol or the floating symbol.
  • the subframe structure of FIG. 2 may be used in a time division duplex (TDD) system of NR to minimize delay of data transmission.
  • TDD time division duplex
  • the subframe structure of FIG. 2 may be referred to as a self-contained subframe structure.
  • the first symbol of the subframe includes a DL control channel and the last symbol includes an UL control channel.
  • the second to thirteenth symbols of the subframe may be used for DL data transmission or UL data transmission.
  • the UE may receive DL data in one subframe and transmit UL HARQ (hybrid automatic repeat request) -ACK (acknowledgement). .
  • HARQ hybrid automatic repeat request
  • ACK acknowledgement
  • a gap may be required for the base station and the UE to switch from the transmission mode to the reception mode or from the reception mode to the transmission mode.
  • some symbols at the time of switching from DL to UL in the subframe structure may be configured as a guard period (GP).
  • the physical resource in the NR will be described.
  • An antenna port is defined such that a channel carrying a symbol on an antenna port can be inferred from a channel carrying another symbol on the same antenna port. If the large-scale nature of the channel through which symbols are carried on one antenna port can be deduced from the channel through which symbols are carried on another antenna port, the two antenna ports may be in a quasi co-located relationship. Large scale characteristics include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial reception parameters.
  • a resource grid composed of a plurality of subcarriers and a plurality of OFDM symbols is defined.
  • the resource grid starts from a particular common resource block indicated by higher layer signaling.
  • each element in the resource grid is called a resource element (RE).
  • a resource block is defined as 12 consecutive subcarriers in the frequency domain.
  • the reference RB is indexed in an increasing direction starting from zero in the frequency domain.
  • Subcarrier 0 of the reference RB is common to all neutrals.
  • the subcarrier at index 0 of the reference RB serves as a common reference point for other RB grids.
  • the common RB is indexed in an increasing direction starting from zero in the frequency domain for each neutral.
  • the subcarriers at index 0 of the common RB of index 0 in each neuralology coincide with the subcarriers of index 0 of the reference RB.
  • Physical RBs (PRBs) and virtual RBs are defined within a bandwidth part (BWP) and are indexed in increasing directions starting from zero in the BWP.
  • the BWP is defined as a contiguous set of PRBs selected from a contiguous set of common RBs, for a given carrier and given neuralology.
  • the UE may be configured with up to four BWPs in the DL, and only one DL BWP may be activated at a given time.
  • the UE is expected to not receive a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), a channel state information reference signal (CSI-RS), or a tracking RS (TSR) outside the activated BWP.
  • PDSCH physical downlink shared channel
  • PDCCH physical downlink control channel
  • CSI-RS channel state information reference signal
  • TSR tracking RS
  • the UE may be configured with up to four BWPs in the UL, and only one DL BWP may be activated at a given time.
  • the UE may be configured with up to four BWPs in the SUL, and only one DL BWP may be activated at a given time.
  • the UE cannot transmit a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH) outside the activated BWP.
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • DM closed loop
  • Up to eight and twelve orthogonal DL DM-RS ports support Type 1 and Type 2 DM-RSs, respectively.
  • Up to eight orthogonal DL DM-RS ports per UE are supported for single-user multiple-input multiple-output (SU-MIMO), and up to four orthogonal DL DM-RS ports per UE are supported for MU-MIMO (multi-user) MIMO).
  • the number of SU-MIMO codewords is one for 1-4 layer transmission and two for 5-8 layer transmission.
  • the DM-RS and the corresponding PDSCH are transmitted using the same precoding matrix, and the UE does not need to know the precoding matrix to demodulate the transmission.
  • the transmitter may use different precoder matrices for different parts of the transmission bandwidth, resulting in frequency selective precoding.
  • the UE may also assume that the same precoding matrix is used over a set of PRBs referred to as a precoding RB group (PRG).
  • PRG precoding RB group
  • DL physical layer processing of a transport channel consists of the following steps:
  • LDPC low-density parity-check
  • Quadrature phase shift keying QPSK
  • quadrature amplitude modulation 16-QAM
  • 64-QAM 64-QAM
  • 256-QAM 256-QAM
  • the UE may assume that at least one symbol with DM-RS exists on each layer where the PDSCH is sent to the UE.
  • the number of DM-RS symbols and resource element mapping are configured by higher layers.
  • the TRS may be sent on additional symbols to assist receiver phase tracking.
  • the PDCCH is used to schedule DL transmissions on the PDSCH and UL transmissions on the PUSCH.
  • Downlink control information (DCI) on the PDCCH includes the following.
  • a DL allocation comprising at least a modulation and coding format, resource allocation and HARQ information associated with a DL shared channel (DL-SCH);
  • a UL scheduling grant comprising at least a modulation and coding format, resource allocation and HARQ information associated with a UL shared channel (UL-SCH).
  • UL-SCH UL shared channel
  • the control channel is formed by a set of control channel elements, each control channel element consisting of a set of resource element groups (REGs). By combining different numbers of control channel elements, different code rates for the control channel are realized. Polar coding is used for the PDCCH. Each resource element group carrying a PDCCH carries its own DM-RS. QPSK modulation is used for the PDCCH.
  • REGs resource element groups
  • a synchronization signal and a physical broadcast channel (PBCH) block (hereinafter referred to as SS block) are a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) occupying 1 symbol and 127 subcarriers, respectively. signal) and three symbols and a PBCH that spans 240 subcarriers but leaves unused portions in the middle for SSS on one symbol.
  • the transmission period of the SS block can be determined by the network, and the time position at which the SS block can be transmitted is determined by the subcarrier interval.
  • Polar coding is used for PBCH.
  • the UE may assume band specific subcarrier spacing for the SS block, unless the network configures different subcarrier spacing to the UE.
  • the PBCH symbol carries its frequency multiplexed DM-RS.
  • QPSK modulation is used for the PBCH.
  • broadband may be used if the network supports it.
  • the bandwidth supported by the network and the UE may be different. At this point, it needs to be clearly defined how the network and the UE will perform transmission and / or reception.
  • FIG. 4 shows an example of a system bandwidth and a bandwidth supported by the UE in an NR carrier.
  • a bandwidth supported by a network is a system bandwidth.
  • the network may combine NR carriers.
  • the bandwidth supported by the UE may correspond to the above-described BWP.
  • 4- (a) shows a case where the system bandwidth and the bandwidth supported by the UE are the same.
  • 4- (b) shows a case where the system bandwidth and the bandwidth supported by the UE are different.
  • the bandwidth supported by the UE is smaller than the system bandwidth.
  • the bandwidth supported by the UE may be larger than the system bandwidth.
  • RF elements may share baseband elements.
  • separate baseband elements may be assigned for each RF element. It is assumed herein that multiple RF elements can share baseband elements / capabilities. This may depend on the UE capability.
  • the system bandwidth may be changed, and the center frequency may also be changed.
  • the DC (direct current) subcarrier may or may not change according to network operation. If the DC subcarrier is changed, it can be instructed to the UE so that the DC subcarrier can be properly processed.
  • UE specific system bandwidth may be allocated to the UE.
  • the following may be considered to allocate UE specific system bandwidth.
  • the carrier may be divided into a set of minimum subbands (M-SBs).
  • M-SBs minimum subbands
  • the set of M-SBs can be configured to the UE by UE specific signaling.
  • the UE may be configured with UE specific signaling the first and last frequency position of the UE specific system bandwidth.
  • the carrier can be divided into a set of PRBs.
  • the set of PRBs may be configured for the UE by UE specific signaling.
  • the carrier can be divided into a set of PRB groups.
  • the set of PRB groups can be configured for the UE by UE specific signaling.
  • the PRB group may consist of M PRBs that may be located in succession.
  • the M PRBs may be selected such that the size is the same as the size of one PRB based on the largest subcarrier spacing supported by the carrier.
  • the set of PRB groups may have the same concept as the above-described BWP.
  • the set of M-SBs, a set of PRBs, or a set of PRB groups is based on reference or basic neuralology. Can be configured.
  • the reference or basic neuralology may be, or predetermined or implicitly configured through a system information block (SIB) / master information block (MIB) or the like used for the SS block. have.
  • SIB system information block
  • MIB master information block
  • the system bandwidth may be updated via SIB / MIB.
  • the center frequency or DC subcarrier may also be updated through SIB / MIB.
  • the carrier is composed of M PRBs.
  • the set of M PRBs may be based on reference or basic neuralology.
  • the UE-specific bandwidth configured at this time may be the above-described BWP.
  • the BWP may be configured per RF. If the UE has a plurality of RFs, the UE may be configured with a plurality of BWPs, one for each RF.
  • At least one of the same / cross slot scheduling or the multi-slot scheduling can be selected by the semi-static configuration, and the switching between the same / cross slot scheduling and the multi slot scheduling can be dynamically indicated.
  • same / cross slot scheduling without multi-slot scheduling may be selected by the semi-static configuration, and the initial starting slot may be dynamically indicated.
  • same slot scheduling and multi-slot scheduling may be configured, and only a duration within a slot may be indicated without an indication of a starting slot index.
  • the set of parameters included in the DCI may be configurable according to the type indicated or configured for the UE to support. Meanwhile, only one of the same / cross slot scheduling or the multi slot scheduling may be selected by the semi-static configuration, and in this case, the dynamic switching between the same / cross slot scheduling and the multi slot scheduling may not be necessary.
  • the starting slot index and / or the period within the slot can be dynamically indicated.
  • both slot-based scheduling and mini-slot based scheduling are configurable by the UE, the following actions can be taken by the UE to distinguish between slot-based scheduling and mini-slot based scheduling.
  • the UE may know whether it is slot based scheduling or mini slot based scheduling. For example, the UE may be instructed whether slot based scheduling or mini slot based scheduling is performed through the discovery area configuration and / or the CORESET configuration. It is possible to configure both the slot-based scheduling and the mini-slot-based scheduling to the UE, in which case the UE may be instructed to indicate the granularity or the mini slot unit through the scheduling DCI.
  • CORESET control resource set
  • the UE may know whether the slot-based scheduling or the mini-slot based scheduling.
  • the slot-based scheduling and the mini-slot based scheduling may use different DCI formats / sizes.
  • the UE may know whether it is slot based scheduling or mini slot based scheduling.
  • timing between control signals and data may be configured based on slot units.
  • UCI uplink control information
  • CSI-RS feedback related parameters may be configured based on slot units.
  • SRS sounding reference signal
  • the indicated value can be interpreted based on the slot of the given neuralology.
  • Neutrality may be defined by a scheduled carrier or an effective carrier on which actual operation may occur.
  • timing between control signals and data, timing between data and UCI, CSI-RS feedback related parameters, SRS related parameters, etc. may be configured based on a symbol unit, a symbol set unit, or a mini slot structure. .
  • the configuration of how indexes / gaps are mapped may be configured by higher layers. For example, the number of symbols used for mini slot scheduling may be indicated.
  • a set of sizes and timings of supported scheduling units may be semi-statically configured.
  • Fields in dynamic scheduling ie, DCI
  • DCI dynamic scheduling
  • the size and timing of the actual scheduling unit may be indicated dynamically.
  • slot based scheduling and mini slot based scheduling can be distinguished through DCI format and / or CORESET configuration.
  • the slot unit and the mini slot unit may be used differently in DL and UL. More specifically, the timing in the DL and the UL may be different depending on the channel relationship such as the timing between the control signal and the data and the timing between the data and the UCI.
  • time domain resource allocation the following may be considered.
  • resource allocation similar to LTE's resource allocation type 2 may be considered. That is, dense / continuous resource allocation may be considered. If slot-based scheduling and mini-slot based scheduling are simultaneously supported, a plurality of symbols may be used for resource allocation in K slots instead of K slots.
  • a bitmap may be indicated for resource allocation.
  • Each bit may indicate a slot format type, rather than indicating on / off of resource allocation.
  • the UE may consider that data may be mapped to each DL portion (ie DL BWP) and each UL portion (ie UL BWP) for DL transmission and UL transmission respectively.
  • the DCI format may be configured based on single slot scheduling.
  • the UE may be configured with information about the maximum number of scheduling and scheduling type.
  • scheduling information for the first slot may be used repeatedly in subsequent slots.
  • individual scheduling information may be given for each slot.
  • a mechanism similar to that described above may be supported in mini slot based scheduling.
  • multiple mini slot based scheduling may not be supported in mini slot based scheduling.
  • the size of the possible data mapping period and the scheduling interval can be configured separately.
  • time domain resources may be individually indicated for slot based scheduling and mini slot based scheduling.
  • the start / last slot / mini slot index may be indicated through a mechanism similar to the resource allocation type 2 of LTE.
  • K slots (or maximum duration) may be configured by higher layer signaling.
  • transport block size (TBS) mapping With regard to transport block size (TBS) mapping according to multi-slot scheduling, the following may be considered.
  • TBS transport block size
  • data may be omitted during multi-slot due to ultra-reliable and low latency communication (URLLC) and / or slot type change, and thus there is a consideration in calculating an effective RE.
  • the UE may determine the TBS using the available RE at the time of receiving the control signal.
  • rate matching occurs that can increase the code rate during multiple slots, the UE does not change the available RE and MCS (modulation and coding scheme).
  • the dynamic indication for rate matching may include information on different slot types based on group common PDCCH and / or information on dynamic rate matching pattern (eg, for CSI-RS and SRS) by group common PDCCH. It may include. Meanwhile, in processing the group common PDCCH transmitted simultaneously or in the same slot, the TBS may be determined without considering the group common PDCCH. That is, the TBS may be determined based only on information from the scheduling DCI. Or, the TBS may be determined based on information from the dynamic scheduling DCI and the group common PDCCH transmitted in the same slot or the same mini slot.
  • the TBS in the DL may be determined by any of the following.
  • Reference number of usable REs per slot Regardless of a start / last symbol or reserved resources of each slot, a reference number of usable REs per slot can be defined. For example, the reference number of available REs for each slot may be defined based on any one of the following assumptions.
  • the maximum number of symbols available for CORESET may be used for the control area, and data and control signals may not be multiplexed in the control area.
  • the slot length may be 14 symbols or 7 symbols depending on the configuration.
  • a DM-RS pattern based on the reference DM-RS pattern or a semi-statically configured DM-RS pattern may be used.
  • a semi-statically configured number of symbols may be used for the guard period (GP) and uplink pilot time slot (UpPTS) (ie, the symbol is not used for the DL).
  • GP guard period
  • UpPTS uplink pilot time slot
  • a reference number of symbols used in mini slot-based scheduling is also configurable.
  • the TBS at the UL may be determined by any of the following.
  • Reference number of usable REs per slot Regardless of a start / last symbol or reserved resources of each slot, a reference number of usable REs per slot can be defined. For example, the reference number of available REs for each slot may be defined based on any one of the following assumptions.
  • the maximum number of symbols available for UCI and / or SRS may be used for the control area, and data and control signals may not be multiplexed in the control area.
  • the maximum number of symbols available for UCI and / or SRS may be the same as the DL control region defined by the system bandwidth.
  • the maximum number of symbols available for DL and / or UL may be indicated by 0 or 1. In this case, 0 may indicate 2 symbols and 1 may indicate 3 symbols. That is, instead of indicating the system bandwidth, 0 or 1 may be indicated. Alternatively, the worst case resource used by the control region may be indicated, so that the UE may exclude the resource from potential data mapping.
  • the slot length may be 14 symbols or 7 symbols depending on the configuration.
  • a DM-RS pattern based on the reference DM-RS pattern or a semi-statically configured DM-RS pattern may be used.
  • a semi-statically configured number of symbols can be used for GP and downlink pilot time slots (ie, they are not used for UL)
  • a reference number of symbols used in mini slot-based scheduling is also configurable.
  • the size of the control region may be zero in a slot other than the slot in which the control signal is transmitted. That is, the control signal may not be transmitted in the corresponding slot.
  • a different number of symbols per slot may be configured semi-statically for the reference number of available REs.
  • the UE may know the fixed DL / UL portion in each slot, so that rather than using a fixed number of DwPTS / UpPTS in each symbol, The actual number of symbols can be used.
  • the reference number of REs may be determined based on the reference number of symbols of each slot, which may exclude an area that is not available for PDSCH / PUSCH.
  • the reference number of symbols of each slot may exclude a portion that changes over time, such as reserved resources, unless the reference number is defined differently according to the slot.
  • Rate matching refers to an operation of matching code rates of other transmissions around a resource to which a specific transmission is transmitted in order to guarantee a specific transmission.
  • PDSCH / PUSCH is scheduled in one slot, and the control channel can be monitored at most once per slot.
  • the actual rate matching can be performed in the scheduled slot.
  • the UE may not acquire the group common PDCCH, so puncturing may be performed instead of rate matching on the indicated rate matching pattern.
  • rate matching may not be performed according to UE processing capability.
  • puncturing may be performed, or the dynamic rate matching pattern may be transmitted only via UE specific DCI. That is, the dynamic rate matching pattern indicated by the group common PDCCH may be applied only to DL data transmission, or puncturing may be performed instead of rate matching when the group common PDCCH indicates a resource that is not available for PDSCH or PUSCH. have.
  • a plurality of rate matching patterns can be configured by higher layers, and the actual rate matching pattern can be indicated by dynamic signaling. At least two rate matching sets may be considered. First, a rate matching pattern in a single slot, which may include a set of zero-power (ZP) CSI-RSs and / or SRSs. Second, with a rate matching pattern in the multi-slot, this may include the period and offset of the ZP-CSI-RS and / or SRS. That is, a configuration associated with a plurality of rate matching patterns may be configured with a period and an offset, and each rate matching pattern may be configured with a set of such configurations.
  • ZP zero-power
  • ZP-CSI RS of period x ms in ZP-CSI-RS pattern 1, ZP-CSI RS of period z ms in ZP-CSI-RS pattern 3, and SRS of period y ms in SRS pattern 3 may be configured.
  • Each set of patterns may include 1) ZP-CSI-RS pattern 1 and SRS patterns 2 and 2) ZP-CSI-RS pattern 3. If 1) is indicated, the UE may perform rate matching around pattern 1/2 for each of the DL / ULs, and if 2) is indicated, the UE may perform rate matching around pattern 3.
  • a set of rate matching patterns and / or RS patterns are constructed and one or more of the patterns can be dynamically selected for rate matching.
  • Some RS patterns may indicate the entire symbol, e.g., to handle different cases of neuralology between data and RS transmission.
  • a pattern including a set of symbols for rate matching may be configured as a valid rate matching pattern, which may have a period and an offset. In addition to the period and offset, the bandwidth of rate matching may also be configured.
  • the control channel can be monitored at most once per slot.
  • one of the rate matching patterns may include a control region configuration. Accordingly, data rate matching can be considered around the control region. That is, when a plurality of slots are scheduled, whether or not rate matching around the control region may be dynamically or semi-statically indicated.
  • (3) PDSCH / PDSCH is scheduled in one mini slot, and the control channel can be monitored more than once per slot.
  • PDSCH / PDSCH is scheduled in one mini slot, and the control channel can be monitored at most once per slot.
  • PDSCH / PDSCH is scheduled in one slot, and the control channel can be monitored more than once per slot.
  • (6) PDSCH / PDSCH is scheduled in a plurality of slots, the control channel can be monitored more than once per slot.
  • Rate matching may be considered in the following cases.
  • LTE cell-specific RS
  • LTE PDCCH
  • Control signals / data transmitted via CSS common search space
  • Beam management CSI-RS (can be included in the ZP-CSI-RS)
  • rate matching around the RS may be either rate matching around the RE used for the RS or rate matching around the symbol used for the RS.
  • the actual rate matching pattern can be either a set of RS configurations or a set of symbols.
  • the set of rate matching patterns may be configured as follows.
  • the rate matching pattern may consist of a set of PRBs or RBGs and a plurality of symbols (ie, start and last symbols).
  • the rate matching pattern at the RE level may also be configured.
  • the rate matching pattern is either the entire symbol or the DM-RS It may be RE used.
  • the rate matching pattern for the DM-RS may be configured differently from the DM-RS pattern indicated for the corresponding UE.
  • Rate matching for PDSCH based on mini slot scheduling will now be described. Regardless of the location of the actual mini slot, the rate matching pattern and the indication thereof may follow the rate matching pattern and the indication in the slot based scheduling. Rate matching can be applied by overlapping PDSCH and rate matching pattern indications. Accordingly, there is an advantage that the UE can always apply the same rate matching mechanism regardless of slot based scheduling or mini slot based scheduling. On the other hand, there is a disadvantage in that the flexibility of the rate matching pattern is poor. This mechanism may be suitable when using mini slot based scheduling in the unlicensed spectrum or millimeter wave (mmWave).
  • mmWave millimeter wave
  • the rate matching pattern can be applied according to at least one of the following mechanisms.
  • the rate matching pattern can be applied assuming that the first symbol of the control signal / data starts after channel sensing as the first symbol of the slot. That is, if the rate matching pattern indicates that the first symbol of the slot is rate matched, the symbol on which the actual rate matching is performed may vary according to the channel sensing result.
  • the first symbol at which the control signal / data starts may be implicitly indicated according to blind detection or explicitly indicated according to group common signaling or the like. This means that the configured RS can be flexibly transmitted by the start symbol.
  • the rate matching pattern can be applied regardless of the first symbol of the transmission. That is, the rate matching pattern can be applied assuming that the slot boundary does not change. This means that the configured RS can be transmitted based on a fixed slot boundary.
  • the rate matching pattern can be applied assuming the first symbol of transmission as the K-th symbol.
  • K may be configured by a higher layer.
  • rate matching for CSI-RS may be applied based on a fixed slot boundary
  • rate matching for DM-RS may be applied flexibly.
  • the set of rate matching patterns may be configured for each symbol or for each mini slot.
  • slot-based scheduling if the start symbol of the control channel is not the first symbol and the duration of the control channel is longer than 1 symbol, or if the start symbol of the control channel is the same symbol as that to which the DM-RS is transmitted, the DM-RS is processed. How to do it is required. Regardless of whether it is slot based scheduling or mini slot based scheduling, this case may be allowed because the control region must be completed before the DM-RS is transmitted. Even if the UE is configured for a longer period, the UE may assume that the actual last symbol of the control channel is earlier than the DM-RS symbol. In such a case, the following may be considered.
  • DM-RS may be rate matched for mapping of control channels in DM-RS symbols.
  • the rate matching pattern for the DM-RS needs to be indicated.
  • a set of different aggregation levels (ALs) may be used to handle a small number of valid REs.
  • DM-RS symbols may be rate matched for mapping of control channels in DM-RS symbols.
  • the REG is not mapped to the DM-RS symbol.
  • the actual REG-CCE mapping may be discontinuous in the time domain.
  • the duration of the control channel may consist of three symbols, one of which may be rate matched due to the DM-RS.
  • the actual period of the control channel is 2 symbols, and REG-CCE mapping may be performed assuming that the control channel is 2 symbols.
  • the REG bundling size in the frequency domain may be 1 or 3.
  • rate matching can be performed around the DM-RS RE or DM-RS symbol.
  • Rate matching for other resources eg, DM-RS symbols
  • Rate matching for group common and other potential CSS or CORESET When the group common PDCCH is transmitted and the UE expects rate matching on the group common PDCCH or CSS REG, the following may be considered for REG-CCE mapping.
  • REG-CCE mapping may not be affected by rate matching.
  • REG-CCE mapping may be performed as if there is no group common PDCCH or CSS REG.
  • CCE-PDCCH mapping CCE with K rate matched REGs may be omitted. That is, the CCE may not be considered as a PDCCH candidate.
  • K may be configured by a higher layer and may have a value of 1 to 6.
  • a CCE with a rate matched REG may be considered for PDCCH mapping.
  • there may be a PDCCH candidate (eg, AL 1) having no RE available for control channel mapping. This PDCCH candidate may be omitted from the monitoring.
  • PDCCH candidates having an effective RE ratio of M% or less may be omitted from monitoring. For example, if the ratio of effective REs after rate matching is less than or equal to M% of REs before rate matching, the corresponding PDCCH candidate may be omitted from monitoring.
  • K may be configured by a higher layer and may have a value of 0 to 100.
  • REG-CCE mapping may be performed by rate matching around the REG or REG bundle for group common PDCCH or CSS.
  • the REG bundle may include one or more REGs.
  • time-first mapping may not be easy.
  • this mechanism can only be used if the REG-CCE mapping is frequency first mapping.
  • temporal priority mapping no REG may be mapped in a PRB with at least one symbol rate matched.
  • time priority mapping the entire symbol may be rate matched. Similar to the processing of the DM-RS, no REG may be mapped to the rate matched symbol. Accordingly, the valid period of the CORESET may be smaller than the configured period.
  • control channel For other UE specific RS, such as CSI-RS or phase tracking (PT) -RS, if the control channel is transmitted in the data area of another UE, the control channel can be mapped to the area where the RS is transmitted. To deal with this case, the following may be considered.
  • CSI-RS CSI-RS or phase tracking (PT) -RS
  • the control channel may not be mapped to the symbol to which the RS is transmitted, or the control channel may not be mapped to the frequency domain and symbol to which the RS is mapped. In particular, there is a need to avoid RS of other UEs.
  • control signals and data between different UEs may be multiplexed by frequency division multiplexing (FDM).
  • FDM frequency division multiplexing
  • the rate matching pattern of the CSI-RS can be used, and the control signal can be mapped around the CSI-RS.
  • the rate matching pattern of the CSI-RS may be indicated with a period for each symbol or for each slot.
  • the RS can be rate matched around the potential control region, and the rate matching pattern can be dynamically indicated for data scheduling.
  • the control channel can be rate matched around the RS for the same UE.
  • the UE may assume that there is no RS transmission for another UE unless the UE is configured with a rate matching pattern or zero power RS for the RS.
  • control signals transmitted in the data domain can be rate matched around the RS.
  • the group common PDCCH may collide with RSs from a plurality of UEs.
  • the mechanism described above may be used for group common PDCCH. If there is a cell common or group common RS known to the UE, rate matching for that RS is also applicable.
  • the group common PDCCH may be configured as part of an RMSI CORESET or other CSS CORESET that the UE has already read before receiving the group common PDCCH. To deal with this case, the following may be considered.
  • a group common PDCCH may always exist regardless of configuration. The UE does not need to read the group common PDCCH until it is configured to monitor it. However, resources for group common PDCCH may be reserved for all CSS CORESET. The disadvantage of this method is that overhead occurs for the group common PDCCH regardless of whether or not the group common PDCCH is actually transmitted. In addition, if the group common PDCCH is transmitted periodically, information should also be used in slots in which the group common PDCCH is not configured.
  • the group common PDCCH may not exist in the CSS read by the UE before the radio resource control (RRC) connection.
  • RRC radio resource control
  • CSS used for RMSI CORESET and / or random access response (RAR) / Msg 4 / RRC configuration may not carry a group common PDCCH.
  • resources for group common PDCCH may be reserved in the last CCE of CORESET. Accordingly, by limiting the number of candidates for RMSI and initial CSS CORESET, the UE can operate transparently from the group common PDCCH in the initial access procedure.
  • the network may omit transmission of the group common PDCCH in the CORESET scheduling the RMSI or the initial connection related PDSCH.
  • the set of CORESET for the initial access procedure may be indicated to the UE, and the UE may expect that the group common PDCCH is not transmitted in the corresponding resource.
  • CORESET used for RMSI or CSS for initial access may not be used for transmission of group common PDCCH.
  • the UE may be configured with separate CORESET for the group common PDCCH or other CSS including the group common PDCCH.
  • rate matching the following may be considered for the processing of the BWP.
  • a set of common rate matching patterns can be applied to any configured BWP and any PDSCH including transmission of common channels.
  • the rate matching pattern may be constructed based on the reference neuralology.
  • the reference neuralology may be defined as the neuralology used for transmission of the SS block or RMSI. Alternatively, the reference neuralology may be configured by higher layers. Alternatively, the reference neuralology may be defined as a neuralology corresponding to a subcarrier spacing of 15 kHz.
  • a set of separate rate matching patterns may be configured for each BWP.
  • a set of separate rate matching patterns needs to be configured for common data scheduling.
  • the rate matching pattern may be configured based on the neuralology used in each BWP.
  • a set of separate rate matching patterns may be configured for each CORESET. For example, if CORESET is shared between two BWPs using the same neuralology, and the smaller BWP is a subset of the larger BWPs, it would be desirable to construct a set of common rate matching patterns based on the large BWPs. Can be.
  • the rate matching pattern indicated in the DCI may be based on a rate matching pattern configured for data BWP. That is, the rate matching pattern can be applied in the scheduled BWP.
  • the rate matching pattern may be indicated by RMSI or on-demand SI (OSI).
  • RMSI on-demand SI
  • another RS such as SS block or beam management RS
  • the ZP-CSI-RS may be configured and one of them may be dynamically indicated, or a set of symbols may be configured for rate matching.
  • common data may be processed by explicitly indicating the start and end symbols, and rate matching may not be applied during that period.
  • Rate matching in multi-slot scheduling can be considered as one of the following.
  • Rate matching pattern per slot may be repeated for each indicated slot.
  • the rate matching pattern can only be indicated for the slot.
  • the rate matching pattern may be dynamically indicated for each slot.
  • Rate matching may only be performed in the first slot (and / or last slot).
  • the rate matching pattern (or rate matching resource) that can be dynamically indicated may be configured by 1 bit or 2 bits. Alternatively, the rate matching pattern may be configured by 3 bits.
  • the timing at which the rate matching pattern is used needs to be clearly defined. At this time, the following matters may be considered.
  • a rate matching pattern of 1 bit or 2 bits may be applied in the scheduled slot.
  • Rate matching may be performed on symbols that overlap between the nonslot PDSCH and the rate matching pattern.
  • Multi-bislots by dynamic scheduling may not cross slot boundaries. In case of crossing the slot boundary, the same method as that of the multi-slot may be used.
  • Rate matching pattern may be applied in the scheduled slot.
  • Multi-slot PDSCH If a 2-bit rate matching pattern is configured for a single slot, the same rate matching pattern may be applied to each slot to which the multi-slot PDSCH is mapped. If there is a semi-statically configured UL slot during the multi-slot PDSCH period, similar to the PUCCH, the multi-slot PDSCH may be delayed in the corresponding UL slot. If a 2-bit rate matching pattern is configured for the two slots, the 2-bit rate matching pattern may be applied to the even / odd slots, respectively, regardless of where the first transmission occurs.
  • the 28-bit rate matching pattern is an even-numbered / Applied to odd-numbered slots, respectively.
  • the transmission may occur discontinuously, so that a 28-bit rate matching pattern is assigned to the even / odd slot regardless of where the first transmission occurs.
  • Each application may be a simpler way. This method may be useful when the UE and the network do not know which slot is the first slot (eg, when the direction of the slot is changed by the group common PDCCH).
  • Cross-carrier scheduling In a scheduled carrier, the rate matching pattern may be dynamically indicated.
  • Cross BWP Scheduling Since there may be a BWP specific rate matching pattern, for cross BWP scheduling such as BWP change scheduling DCI, the rate matching pattern may be applied at the scheduled or modified BWP.
  • time-frequency resource allocations may be used for rate matching.
  • time-frequency resource allocation in the control region and time-frequency resource allocation in the data region may be separately indicated.
  • the time-frequency resource allocation in the control region may be based on the potential maximum control region size or semi-statically configured control region size. Accordingly, although sharing between the control signal and the data is limited to the FDM scheme and there is no processing for the mini slot-based control signal in the data area, a rate matching pattern may not be required.
  • time-frequency resource allocation it may be considered to divide the resource region into K regions, rather than dividing the resource region into two regions. Each region may be configured by a higher layer.
  • Rate matching for contiguous resource allocation is described. If UL or DL resources are configured continuously, and reserved resources do not partially overlap with the configured resources or span the entire symbol, additional processing may be needed to ensure that the resources still continue after rate matching. For example, if the UE is configured with PRB 0-49 and the reserved resources are mapped to symbols k, i and j of PRBs 10-15 and 20-25, then the UE is PRB 0-9, 16-19 after rate matching. And 26-49 discontinuous resources. In order to ensure continuous resource allocation even after rate matching, the following may be considered.
  • the UE may use only the last fragmented portion. For example, in the above example, the UE may use only PRB 26-49 among PRB 0-9, 16-19, or 26-49. The remaining fragments are not used for resource allocation. That is, rate matching may be performed on unused resources. This is to ensure that allocated resources can be used continuously.
  • reserved resources can ensure continuous resource allocation even after rate matching.
  • reserved resources may be configured in PRB 0-25, rather than partially configured. However, this method can limit scheduling flexibility.
  • the network may schedule so that resources can be allocated continuously after rate matching. For example, resource allocation may start from PRB 20 and continue, or resource allocation may be performed from PRB 0 to 15. However, this method may limit the scheduling flexibility when reserved resources are configured over different frequency domains in different symbols or different mini slots.
  • rate matching may be performed over the symbols to which the reserved resources are mapped. For example, if the scheduled resource and the reserved resource overlap, the UE may not map data in symbols k, i and j.
  • rate matching mechanism may be applied only in the case of discrete Fourier transform spread OFDM (DFT-s-OFFM), and in the case of OFDM, rate matching may be applied only to reserved resources (ie, non-contiguous resources). Leads to allocation).
  • DFT-s-OFFM discrete Fourier transform spread OFDM
  • reserved resources ie, non-contiguous resources
  • Reserved resources will be described in more detail. In allocating resources for data mapping, reserved resources or resources that cannot be used for data mapping need to be defined more clearly. There may be reserved resources that need to be rate matched for data mapping. For example, in case of LTE-NR coexistence, in order to protect the PDCCH region and CRS symbol of LTE, NR data needs to be mapped avoiding around the PDCCH region and CRS symbol of LTE.
  • the CRS symbol of LTE may be configured as a semi-static reserve resource for the slot. For the PDCCH region of LTE, the following may be considered.
  • semi-static reserve resources may be configured for control signals and data. For example, for a subcarrier spacing of 15 kHz, three symbols may be configured as reserved resources. In this case, if a PDCCH region smaller than 3 symbols is used, some reserved resources may be wasted.
  • Semi-static reserved resources for the control channel may be configured.
  • a start point and a period of the control region may be configured for each CORESET. This is because dynamic signaling for the control channel is not intuitive.
  • a start symbol can be dynamically indicated for the data.
  • the start symbol of the control region may be defined as a fourth symbol, and the data may be started even before the fourth symbol according to the size of the PDCCH region of LTE. As a result, data may start before the start of the control region.
  • Dynamic indication of PDCCH region of LTE for control signals and data In order to maximize resource utilization for both control signals and data, reserved resources may be dynamically indicated for control signals and data. In order to enable dynamic indication of reserved resources for the control signal, the UE needs to perform more blind decoding. For example, the start symbol of the control region is defined as a second symbol, and the UE may perform blind decoding on each symbol up to a symbol composed of the control region. This can increase the UE complexity. Dynamic indication of reserved resources for control signals and data may be implemented by configuring mini slot based control channel monitoring. For example, control channel monitoring may be performed at every symbol.
  • FIG. 6 shows an example in which LTE-NR coexists according to an embodiment of the present invention.
  • the start symbol and duration for the control region may be configured semi-statically, and the start symbol for data may be dynamically indicated. Data can occur earlier than the start of the control region. 6 shows an example in which LTE and NR using a subcarrier spacing of 30 kHz coexist.
  • data starts at the third symbol and the control region starts at the seventh symbol. That is, data starts before the control area.
  • the data starts at the sixth symbol and the control area starts at the fifth symbol.
  • slot-based scheduling is supported in a general subframe
  • different CORESET start positions may be configured for each slot, and a start point of data may be dynamically indicated for each slot.
  • control signals and data may be mapped to non-PDCCH regions and / or non-CRS symbols.
  • Cross slot scheduling NR-PUSCH and NR-PDSCH may be scheduled over a plurality of slots for various reasons.
  • reserved resources for data mapping may be needed to enable transmission of DL control signals and UL control signals in a given slot.
  • reserved resources may be required for CSI-RS and / or SRS transmission, and dynamic indication for mapping of data regions in each slot may be required.
  • TDM time division multiplexing
  • the UE is configured for at least time domain bundling units, even if the UE is configured for control channel monitoring to ensure phase continuity of UL transmission. No change is needed for DL monitoring. Even in this case, the configured CORESET may be rate matched for NR-PUSCH data transmission.
  • the UE may be indicated a start symbol for the NR-PDSCH through the DCI, and the start symbol may indicate an earlier symbol than the start symbol for CORESET.
  • the resource allocation mechanism is described below. Different resource allocation mechanisms can be considered as follows to indicate rate matching for data for various reserved resources.
  • Reserved resources may be dynamically indicated at the symbol level.
  • a bitmap of scheduling unit size may be used to indicate the reserved resource.
  • the scheduling unit size may be defined as the size of the maximum scheduling unit that the UE can be scheduled.
  • the size of the maximum scheduling unit may be configured for each UE specific data and common data for each UE.
  • the size of the maximum scheduling unit may be configured by PBCH or SI.
  • symbols can be grouped.
  • continuous resource mapping may be considered. However, this may not be effective for indicating dynamic resources as reserved resources in the middle of the scheduling unit.
  • the UE may be indicated with a pattern index.
  • Time Domain Resource Allocation in Slots When cross slot scheduling or multi slot scheduling is configured, the corresponding time domain resource allocation may be repeated over a plurality of slots.
  • the dynamic indication of the time domain resource based on the maximum scheduling unit (that is, (1) described above) may have a large overhead depending on the size of the scheduling unit. In view of this overhead, time domain resources may be scheduled within a slot, and the same pattern may be the same across slots on a scheduling unit.
  • the disadvantage of this method is that it is not possible to consider different reserved resource patterns in different slots. For example, it is the case of rate matching around CSI-RS and / or SRS. Thus, if at least the UE is scheduled in the slot via cross slot scheduling, the indication for rate matching may be applied in the slot where the actual data is transmitted or received.
  • Reserved resources may be determined based on the group common PDCCH. That is, the reserved resources in each slot may be indicated by the group common PDCCH.
  • the disadvantage of this method is that the performance of data transmission / reception of the UE may be degraded when the UE does not stably detect the group common PDCCH.
  • a dynamic indication of reserved resources or an indication based on group common PDCCH may be considered.
  • a start symbol of the NR-PUSCH may be indicated.
  • the last symbol of the NR-PDSCH and NR-PUSCH may be indicated.
  • the CSI-RS and / or SRS uses different numerologies from the data, it may be necessary to empty the entire symbol according to the UE capability.
  • the TBS may be determined based on the effective RE after applying the rate matching pattern (in this case, some coarse units may be needed).
  • the TBS may be determined based on the total RE determined by the number of slots or the number of symbols.
  • the TBS may be determined based on the number of scheduled symbols excluding the scheduled RB and fully rate matched symbols.
  • the TBS may be determined based on the aforementioned factors and the scaling factor indicated in the DCI. This may mean that the rate matching pattern is specified without assuming by the time domain resource allocation specified by the scheduling DCI.
  • the TBS may be determined based on a reference RE determined based on a reference configuration based on a scheduled RB, a scheduled slot size or number of slots, and a scaling factor indicated in the DCI. This may mean that the rate matching pattern is specified without assuming by the time domain resource allocation specified by the scheduling DCI.
  • Unicast PUSCH / PUCCH Dynamic resource selection can be used. If dynamic resource selection is not used, the UL transmission ends before the rate matching pattern begins (i.e. the UL transmission is not discontinuous) or if there is a rate matching pattern that overlaps the UL transmission, then the entire UL transmission will be skipped. Can be.
  • the entire UL transmission may be omitted.
  • the duration of the UL transmission may be determined by the start position and the last position.
  • the start position may be the first available symbol that is equal to or greater than the indicated start symbol (ie, does not overlap the rate matching pattern).
  • the last position may be the last available symbol before the resource of the first rate matching pattern in the time domain. That is, only continuous transmission can be supported.
  • the UL transmission may be determined based on rate matching. If the rate matching pattern spans more than K symbols, the first or second method described above may be applied.
  • the first method ie, transmission omission
  • the second method may be used / configured for the PUSCH / PUCCH.
  • SRS Only consecutive pieces of SRS transmission can be considered. If there are a plurality of consecutive fragments, the UE may select and transmit the largest fragment, or the UE may arbitrarily select and transmit. If there is a portion overlapping with the reserved resources, the entire SRS transmission can be omitted. Also, a plurality of SRS configurations may be configured / instructed, and the UE may select at least one SRS configuration that does not overlap with reserved resources among the plurality of SRS configurations configured / instructed to the UE. If a transport comb is used, it needs to be clearly defined that the SRS resources may not overlap with other SRS resources. If a transmission com is used and the rate matching pattern does not overlap the SRS, the SRS may be transmitted.
  • the duration of the long PUCCH may be implicitly determined by determining the start / last symbol as described above. Alternatively, the duration of the long PUCCH may be determined by additionally considering the information transmitted by the DCI. After determining the duration of the long PUCCH, a DM-RS pattern and / or a hopping pattern can be determined. That is, the DM-RS pattern and / or the hopping pattern may be determined after applying the rate matching pattern. Or, the PUCCH may be transmitted regardless of the rate matching configuration. That is, PUCCH transmission can ignore rate matching configuration.
  • UE operation in the DL may be similar to UE operation in the UL.
  • One transmission may not occur across this rate matching pattern.
  • at least different DM-RSs may be transmitted.
  • two or more pieces may be treated as a plurality of mini slots, and an independent DM-RS may be transmitted in each mini slot.
  • One TB may be mapped onto a plurality of mini slots or repeated on the plurality of mini slots. That is, scheduling is performed based on slot-based scheduling or continuous scheduling, and DM-RS transmission and data mapping may be based on mini slot scheduling.
  • discontinuous transmission may not be used.
  • DM-RS may be rate matched over all symbols in a scheduled period. Similar mechanisms can be used when additional DM-RSs are sent. Or, 2) when mini-slot based scheduling is used, regardless of whether it is the first or second DM-RS, the entire PRB can be rate matched. Alternatively, 3) DM-RS may be postponed with symbols that are not rate matched.
  • the first DM-RS location may be determined by a rate matching pattern, and the first symbol on which rate matching is not performed may be selected from candidate positions for DM-RS transmission.
  • the above-described method can be applied only to forward-sided DM-RS, the additional DM-RS can be transmitted at all times unless the rate match.
  • Rate matching pattern may not be applied to DM-RS. Regardless of the configuration, if a PRB / symbol is scheduled, the DM-RS can be transmitted according to the configuration.
  • the frequency position also needs to be adjusted by the rate matching pattern, similar to the time domain.
  • the first PRB may be determined as the first PRB that does not overlap with the rate matching pattern after the scheduled PRB.
  • the last PRB may be determined as the last PRB of the scheduled PRBs in consecutive PRBs after the first PRB, or as the first rate-matched PRB in any symbol in the resource scheduled after the first PRB.
  • a UE moves or is configured to monitor different initial DL BWPs or basic BWPs for an IDLE state from an initial DL BWP to which the UE first connects, it is necessary to configure a rate matching pattern in a cell specific configuration.
  • different rate matching patterns may be configured cell-specifically or UE-specifically for different SS blocks.
  • the rate matching pattern for each SS block may include resources (time / frequency resources or time resources or frequency resources) associated with different SS block indexes. According to the correlation between the rate matching pattern and the SS block index, the UE may apply different rate matching patterns according to the position of the current BWP.
  • the rate matching pattern may be configured per BWP for paging and BWP for the random access procedure.
  • the UE may be instructed with RMSI scheduling information, and the UE may read the RMSI for a rate matching pattern rather than copying the transmission when the BWP changes.
  • the rate matching pattern can be indicated from the network via UE specific signaling. That is, if the UE is outside the cell-specific rate matching pattern in the frequency domain, the UE may receive UE specific signaling for the rate matching pattern, or the UE may receive RMSI information to read the RMSI in the new frequency domain.
  • the rate matching pattern when the rate matching pattern is ignored (eg, for DM-RS / PUCCH / PRACH), it is necessary to clearly define whether only the dynamically matched rate matching pattern is ignored for the corresponding channel.
  • the semi-statically configured rate matching pattern may be applied to the corresponding channel.
  • only cell-specific rate matching patterns can be applied. This is because the network does not know which UE uses the PRACH resource. In particular, cell-specific rate matching patterns can be applied only for contention-based PRACH resources.
  • the cell-specific rate matching pattern Not applied or transmission of DM-RS / PRACH / PUCCH may be delayed.
  • slots or symbols reserved by a cell-specific configuration may not be taken into account when determining timing to prevent collision with reserved resources.
  • the data channel period (which may include the start / last symbol index) may be cell-specific by RMSI.
  • a plurality of start / last symbols may be configured and different sets may be selected according to the rate matching pattern. For example, a maximum duration without collision with the rate matching pattern may be selected.
  • the following restrictions may be applied to the cell specific rate matching pattern.
  • -Reserved resources may start only within consecutive K symbols from the first symbol, or only within the last symbol of the slot from before the K1 symbol in the last symbol of the slot.
  • the entire PRB can be reserved at least in a slot indicated by signaling (or a slot by period or time pattern).
  • RMSI scheduling there may be no reserved resources except for candidate SS blocks. To this end, the following may be considered.
  • the start symbol for the data can be semi-statically constructed or dynamically indicated.
  • the same symbol as the start of the CORESET configuration in a given slot can be used as the starting position of the data.
  • the first symbol of the slot may be used as the start position of the PDSCH / PUSCH.
  • the start / last symbol may be configured semi-statically or may be dynamically indicated by the RAR. If neither is possible, the first symbol may be used as the starting position, or the next symbol of CORESET + k2 (processing time of the PUSCH) may be used as the starting position, depending on the timing between the UL grant and the PUSCH.
  • the configured reserved resources may not apply, regardless of whether the reserved resources are shared with other channels such as RAR.
  • rate matching patterns configured by RMSI may be applied to other broadcast PDSCHs and CORESETs (except for RMSI CORESET).
  • the UE specific configured rate matching pattern may not apply.
  • the UE-specific configured rate matching pattern may not be applied.
  • the operation of the UE is configurable. The at least UE specific configured and dynamically indicated rate matching pattern may not apply to CORESET.
  • rate matching patterns configured semi-statically by cell specific configuration may be applied.
  • a rate matching pattern it may be indicated whether a rate matching pattern is required for broadcast data.
  • the rate matching pattern applied to the data may be indicated by a combination of ⁇ CORESET, SS block ⁇ .
  • the UE may use mini slot based scheduling in the corresponding slot. This may be explicitly indicated by configuration of a subset of slots by DCI, or slot-based scheduling and mini-slot based scheduling, or search region classification configuration or DCI format classification configuration. That is, the UE may support slot based scheduling or DM-RS Type A, and the DM-RS may exist in the third or fourth symbol of the subset of slots. Or, the UE may support mini slot based scheduling or DM-RS Type B, and the DM-RS may exist in the first start symbol of the data region. Whether to support multiple configurations within a slot depends on the UE capabilities. Each DM-RS type may be dynamically selected to not collide with the rate matching pattern. In addition, the DM-RS pattern including the symbol in which the DM-RS is present may be dynamically configured.
  • the cell specific rate matching pattern and the UE specific rate matching pattern may be applied to the UE specific data.
  • the cell specific rate matching pattern may be applied to cell broadcast data except for RMSI, and may be applied to CORESET except for RMSI CORESET.
  • the cell specific rate matching pattern may be applied to the SS block for the RMSI PDCCH or the SS block for which the UE monitors the RMSI PDCCH.
  • the cell specific rate matching pattern may be applied to RS / PRACH transmission.
  • Rate matched PRBs may not be included in the TBS calculation.
  • overall rate matched symbols may not be included in the TBS calculation.
  • PRB bundling may not be affected by rate matching, and only rate matched PRBs may not be used.
  • PRBs when one or more PRBs are rate matched, this may depend on DM-RS or data.
  • the entire PRB bundle including data may be rate matched.
  • the PRB of the rate matching pattern can be used. That is, if rate matching is performed on the DM-RS in the frequency domain, PRBs sharing the same precoding may also be rate matched.
  • the PRB of the rate matching pattern may not carry the RS.
  • data may be transmitted. That is, in case of wideband RS transmission in CORESET, rate matching of RS and control signal may follow a rate matching pattern when the control signal is rate matched. If the DM-RS collides with the rate matching pattern and either of them is delayed or changed, the above content may not apply.
  • the rate matching pattern may be applied after interleaving (ie, for physical resources).
  • the REG may be rate matched in the RE that overlaps the indicated resource (eg, a set of SS blocks or rate matching patterns or fixed UL resources actually transmitted). That is, the REG may be rate matched from the RE not available to the RE level.
  • the indicated resource eg, a set of SS blocks or rate matching patterns or fixed UL resources actually transmitted. That is, the REG may be rate matched from the RE not available to the RE level.
  • the entire REG may be rate matched on the PRB.
  • the entire REG bundle may be rate matched on the REG.
  • rate matching is performed at the REG level, rate matching is performed at the REG level for an SS block of 21 PRBs rather than an SS block of 20 PRBs. Can be performed.
  • the entire CCE may be rate matched on the REG.
  • the entire PDCCH may be rate matched on the REG.
  • rate matching at the RE level, the REG level, the REG bundle level, the CCE level, or the PDCCH candidate level may be considered.
  • CSI-RS / PT-RS or other RS When DFT-S-OFDM or DFT is not used, rate matching may be performed at the RE level, or the entire symbol may be rate matched. Alternatively, bandwidth adjustment may be performed by semi-static configuration or dynamic indication.
  • Information and rate matching pattern or UL resource for actual transmitted SS block indicated by cell specific signaling The UE may expect that the actually transmitted SS block is not indicated with UL resource or rate matching pattern. Or, for the purpose of rate matching, the union of the actual transmitted SS block and rate matching pattern and resource set for UL resources may be used. In addition, for measurement purposes, the measurement configuration may be followed. That is, the SS block configured for the measurement may not be changed to at least the UL resource.
  • a rate matching pattern may be configured in a resource whose SS block is not rate matched. That is, the SS block can be transmitted following the measurement configuration.
  • the union of the construction of the rate matching pattern for the purpose of rate matching may include the following.
  • the union of information and rate matching pattern or UL resource configuration of rate matching pattern for data mapping is actually used for SS block indicated by UE specific signaling.
  • the measurement configuration can be followed. That is, the SS block configured for the measurement may not be changed to at least the UL resource.
  • a rate matching pattern may be configured in a resource whose SS block is not rate matched. That is, the SS block can be transmitted following the measurement configuration.
  • the union of the construction of the rate matching pattern for the purpose of rate matching may include the following.
  • PRACH / PUSCH / PUCCH In UL, rate matching may be performed at the beginning or end of each transmission by adjusting or selecting different transmission periods. This means that if a UL transmission collides with a rate matching pattern or DL resource, different PRACH formats can be selected.
  • PRACH resources may be valid in the following cases.
  • At least contention-based PRACH may be transmitted in an unknown or flexible resource by the SFI or DL / UL configuration.
  • resources may be indicated only on UL resources. That is, if the indicated resource collides with an unknown resource or a flexible resource, the corresponding PRACH transmission may be omitted.
  • SRS If SFI is configured, semi-static SRS can be validated as UL transmission by SFI. Otherwise, the SR can be sent according to the configuration. In addition, aperiodic SRS may be transmitted in an unknown resource or a UL resource. If the SRS partially overlaps with reserved resources, DL resources, or unavailable resources, one of the following may be considered.
  • SRS transmission may be omitted only in overlapping PRBs.
  • -Transmission of SRS may be omitted only in overlapping REs.
  • transmission of the entire SRS may be omitted in SC-FDM, and transmission of the SRS may be omitted only in an overlapping portion in OFDM.
  • RAR window In calculating the RAR window, only semi-static DL / UL configuration and / or DL resources configured by SFI or unknown or flexible resources may be considered. Alternatively, only DL resources may be considered. Alternatively, the RAR window can be calculated regardless of the resource type.
  • Msg 3 timing In calculating the timing of Msg 3, only UL resources or unknown resources or flexible resources configured by the semi-static DL / UL configuration and / or SFI may be considered. Alternatively, only UL resources may be considered. Alternatively, the timing of Msg 3 may be calculated regardless of the resource type.
  • Msg 3 repetition period In calculating the repetition when Msg 3 is repeated in a multi-slot, only UL slots or unknown slots or flexible slots configured by semi-static DL / UL configuration and / or SFI may be considered. Can be. Alternatively, only UL slots may be considered. Alternatively, only slots containing at least K UL symbols or unknown symbols may be considered. K is the period for Msg 3 transmission in the slot. Alternatively, only slots containing at least K1 UL symbols or unknown symbols may be considered. K1 may be configured by a higher layer. Alternatively, the repetition period of Msg 3 may be calculated regardless of the resource type.
  • PUCCH resource indication in the time domain The resource may be configured only in a plurality of slots (eg, 1, 2, 4 ...), and the selected value may be applied across the slots regardless of the resource type. .
  • the resource may be configured regardless of whether all slots are considered, only UL slots, or UL slots / unknown slots. That is, counting the number of slots in a resource set may be configured by configuring a resource set for PUCCH timing resources.
  • the rate matching pattern may vary.
  • the rate matching pattern associated with the control signal may vary.
  • cross carrier scheduling the following case may be considered.
  • the same neuralology may be used between the scheduling carrier and the scheduled carrier of the same slot size.
  • the same subcarrier spacing having a different cyclic prefix (CP) overhead between the scheduling carrier and the scheduled carrier of the same slot size may be used.
  • a scheduling carrier having a larger subcarrier spacing may schedule a PDSCH to a carrier having a smaller subcarrier spacing.
  • a scheduling carrier having a smaller subcarrier spacing may schedule a PDSCH to a carrier having a larger subcarrier spacing.
  • the data scheduling symbol can be dynamically indicated by the DCI. If the dynamic indication is not used, the offset from the first symbol of the slot may be indicated in symbol units, mini slot units, or slot units based on the neurality of the scheduled carrier.
  • the rate matching pattern may follow the rate matching pattern of the scheduled carrier.
  • the same process as that for the multi-slot can be performed.
  • a set of rate matching patterns can be configured semi-statically, one of which rate matching patterns can be dynamically indicated.
  • the rate matching pattern may be a bitmap (eg, 12 bits) of the RE level and may indicate that the set bit is used for other purposes except data mapping.
  • the entire symbol may be empty in the time domain resource.
  • any one of the following may be considered.
  • a rate matching pattern may be applied to all active BWPs.
  • Additional information may be configured for the frequency domain to which the rate matching pattern is applied.
  • a set of a plurality of rate matching patterns can be configured, and each set can be configured in the frequency domain.
  • rate matching patterns may be individually indicated for each frequency region.
  • a set of a plurality of rate matching patterns can be constructed, and each rate matching pattern can be indicated with frequency information.
  • the frequency may be continuous or discontinuous.
  • the number of bits of the indicator indicating the rate matching pattern in option (1) may be K * M.
  • K is the number of bits required for each symbol, and M is a scheduling unit.
  • one rate matching pattern selected for one symbol may be repeated during the scheduling unit. This may be particularly effective when mini slot scheduling is used. Whether to use the same rate matching pattern may be separately indicated.
  • Option 1 may be extended and applied even when multi-slot scheduling is used.
  • a set of rate matching patterns can be configured semi-statically, one of which rate matching patterns can be dynamically indicated.
  • the rate matching pattern may be a bitmap (eg, 12 bits) of the RE level and may indicate that the set bit is used for other purposes except data mapping.
  • Information on the time-frequency domain resource to which the rate matching pattern is applied may be configured for each rate matching pattern.
  • the number of bits of the indicator indicating the rate matching pattern may be K1 * M1.
  • K1 is the number of bits required for each mini slot, and M1 is M divided by the size of the mini slot.
  • the same rate matching pattern may be repeatedly used as in option (1).
  • a set of rate matching patterns can be configured semi-statically, one of which rate matching patterns can be dynamically indicated.
  • a set of rate matching patterns can be configured semi-statically, one of which rate matching patterns can be dynamically indicated. Regardless of where scheduling occurs, the rate matching pattern can start every P slot. If single slot scheduling is performed in slot P-2, the rate matching pattern in slot P-2 may be applied to the scheduled PDSCH. If multislot scheduling is performed over two P slots, two rate matching patterns may be indicated for each P slot.
  • the UE may consist of a subset of a plurality of slots, and the subset of each slot may consist of a set of rate matching patterns.
  • the indication of the rate matching pattern can be applied to the set of configured rate matching patterns. For example, if the CSI-RS is configured every 5 slots, the rate matching pattern including the CSI-RS may be configured every 5 slots. In addition, every 5 slots, the UE may be configured with a different set of rate matching patterns.
  • a rate matching pattern on a slot in which a PDSCH is scheduled may be used for rate matching.
  • an indication of different rate matching patterns may be performed. If two slots belong to the same subset of slots for configuration of the rate matching pattern, the same rate matching pattern may be applied to the two slots. For slots to which the same rate matching pattern is applied, duplication can be suppressed to reduce signaling overhead.
  • the size of bits required for dynamic indication per subset of each slot may vary depending on the number of configured rate matching patterns.
  • the size of the bit indicating the rate matching pattern may be adjusted to the largest bit size, or a fixed value may be used. The fixed value can be used by the network by adjusting the number of slots scheduled at one time.
  • sets of different rate matching patterns may be configured for each subset of slots.
  • FIG. 7 illustrates an example of a rate matching pattern according to an embodiment of the present invention.
  • FIG. 7- (a) shows a case in which option 1 described above, that is, a set of rate matching patterns is semi-statically configured for each symbol, and one rate matching pattern is dynamically indicated.
  • 7- (b) shows a case in which a set of rate matching patterns is semi-statically configured for option 2 described above, that is, each mini slot, and one rate matching pattern is dynamically indicated.
  • FIG. 8 shows another example of a rate matching pattern according to an embodiment of the present invention.
  • FIG. 8 illustrates a case where option set described above, that is, a set of rate matching patterns is semi-statically configured for each slot, and one rate matching pattern is dynamically indicated.
  • different sets of rate matching patterns may be configured for each configured BWP.
  • the UE may apply a semi-static rate matching pattern.
  • the rate matching pattern may be indicated by the group common PDCCH.
  • a plurality of transmission / reception point (TRP) processing will be described.
  • TRP transmission / reception point
  • control signals and data may be transmitted from different TRPs. Therefore, a set of rate matching patterns may be configured for each TRP, and the indicated state may be interpreted differently according to information of a transmitter and information of a receiver. To support this, the following can be considered.
  • the indication of the rate matching pattern can be distinguished between the control region and the data region. Since different beams or different TRPs can be used, a set of rate matching patterns can be configured independently for each control region and data region, and the indication of the rate matching patterns can be individually indicated through the DCI. For the control region, the set of rate matching patterns can be applied for data mapping in the control region / symbol, where the set of rate matching patterns can be configured separately and dynamically indicated.
  • the indication of the rate matching pattern may be interpreted differently according to beam or quasi-collocated (QCL) information related to the data.
  • QCL quasi-collocated
  • a set of different rate matching patterns may be configured for each beam or for each QCL information, and an appropriate set of rate matching patterns may be selected for rate matching according to the beam or QCL information indicated in the DCI.
  • the control symbols may be rate matched or different rate matching patterns may be used.
  • the rate matching pattern may be configured for each beam, for each RS in a QCL relationship, for each TRP, for each CSI-RS, or for each SS block.
  • a beam set PEK indicated for data transmission a different set of rate matching patterns may be used.
  • Each rate matching pattern may indicate an RS or SS block in one or more applicable beam or QCL relationships.
  • Type 1 A set of PRBs or RBGs in the frequency domain can be considered.
  • One or more symbols may be applied in a slot. That is, the resource set in the frequency and time domain may be configured as a resource allocation type. This resource set may have a period and an offset.
  • an entire PRB may be rate matched in the first 1-3 symbols in a general subframe, and the entire PRB may be rate matched in the first 1-2 symbols in a multicast broadcast single frequency network (MBSFN) subframe.
  • MBSFN multicast broadcast single frequency network
  • a rate matching pattern for 1-3 symbols may be configured, for example, every 10 ms period and the rate matching pattern may be applied only in a normal subframe.
  • a rate matching pattern for 1-2 symbols may be configured, for example, every 10 ms period and the rate matching pattern may be applied only in the MBSFN subframe.
  • the period of the slot may be used.
  • one or more resource sets may be configured with different CORESETs in consideration of different frequencies and symbols.
  • the PUCCH resource and the SRS resource may be configured with a specific period.
  • Type 2 The configuration of the RS pattern may be considered.
  • a CSI-RS configuration can be considered along with the period and offset.
  • the UE can apply rate matching on the union of the configured resource set.
  • Resource sets may be configured cell-specific (eg, by RMSI or OSI). Before the resource set is configured, the UE may assume that there is no rate matching resource.
  • a preconfigured basic resource may be configured. This is to avoid the LTE PDCCH region. In this case, the LTE PDCCH region may have a maximum size or two symbols may be reserved for LTE-NR sharing. That is, at least one bit may be used in the RMSK or OSI to enable or disable a particular predefined set of resources.
  • the resource set may be predefined as follows.
  • Every 2 symbols may be reserved in each slot (for LTE-NR coexistence).
  • Every 3 symbols can be reserved in each slot (for LTE-NR coexistence).
  • Every 1 symbol may be reserved for SRS in each slot.
  • CRS may be reserved based on the antenna port and vshift value in each slot.
  • the predefined resource set may not be optimal, but may be one of methods for overcoming reserved resources.
  • the UE may be configured with a set of reserved resources. Between a cell-specific reserved resource set and a UE-specific reserved resource set, the operation of the UE may follow.
  • cell-specific reserved resources may be applied first, and then UE-specific reserved resources may be applied. That is, the union of cell specific reserved resources and UE specific reserved resources may be applied.
  • the cell specific reserved resource may be ignored unless configured to the UE again. That is, UE-specific reserved resources may take precedence over cell-specific reserved resources.
  • the UE specific rate matching pattern / set may be applied to the UE specific scheduled control signal / data
  • the cell specific rate matching pattern / set may be applied to the cell specific scheduled control signal / data. It may be indicated whether to apply the cell-specifically configured set of resources to the UE specific control signal / data. For example, cell-specific resources such as SS blocks or other resources may be applied to the UE-specific control signals / data. Therefore, whether or not each UE inherits a set of cell-specific reserved resources may be configured / instructed as it is.
  • -Cell specific reserved resources may be used until UE specific reserved resources are configured. When UE-specific reserved resources are configured, only UE-specific reserved resources may be applied regardless of unicast / broadcast data, or different reserved resources may be applied to unicast / broadcast data.
  • each resource set by L1 signaling There may be many resource sets representing different resources for rate matching. Indicating each resource set by L1 signaling is inefficient. That is, there may be resources that are not dynamically changed (eg, SRS or PDCCH of LTE) and these resources need not be indicated by L1 signaling. In addition, there may be many resource sets in which scheduled data does not overlap in the time and / or frequency domain, except for resources configured only semi-statically. For example, if a specific resource set has a rate matching pattern in only the second slot every 10 slots, it may be wasteful to indicate the resource set in the remaining nine slots. Therefore, grouping resource sets similar to aperiodic CSI-RS reporting for L1 signaling may be considered. Table 1 shows an example of grouping 16 rate matching resource sets RRM1, RMR2 ... RMR16.
  • RMR1-4 can be represented by a combination of three of different CORESETs, which can be indicated by states 0, 1 or 2.
  • other combinations of different resource sets may be indicated.
  • the actual application of each resource set can follow the periodic / offset and resource mapping configuration of each resource set. Mapping between states and resource sets to minimize unnecessary signaling for resource sets outside of the active BWP.
  • the table may be indicated by L1 signaling for each BWP.
  • the resource set may be configured differently for each BWP.
  • the entire set may be configured per cell, and the mapping between the state and the resource set may be configured per BWP.
  • a set of slots and / or symbols to which a period and / or offset or a corresponding rate matching resource set may be applied may be defined as follows.
  • a slot and / or symbol configured to monitor at least one set of search areas associated with the corresponding CORESET may be considered a slot and / or symbol to which the corresponding rate matching resource set is applied.
  • the corresponding rate matching resource set may be considered invalid or not applicable.
  • the rate matching pattern may be defined by the configuration for monitoring the search region set associated with the CORESET.
  • the CORESET may be configured with a period and an offset for the purpose of the rate matching resource set.
  • each state may correspond to a combination of configurations of one or more RS patterns.
  • the RS pattern configuration and the resource set of the PRB level may be combined by state and may be indicated in L1 signaling.
  • the design of the rate matching pattern may be as follows.
  • the UE may be configured with one or more resource sets, and the configuration for this may include at least one of the following information.
  • a frequency resource based on the RE pattern in the slot or time and / or the resource allocation type indication in the slot can be extended for multiple slots
  • Period in which the rate matching pattern is valid an offset may be configured together. If the rate matching pattern is applied to each slot, this information can be omitted.
  • Resource Index If the number of bits for the UE to dynamically indicate a set of rate matching patterns is limited, the resource index can be used to select only a limited set of resources. That is, if there are more resource sets than the DCI field can indicate, only some of them may be selected based on the resource index.
  • the applied rate matching pattern can be derived dynamically.
  • the applied rate matching pattern may be derived based on the TRP for data transmission / reception. Since everything can be determined based on slot index and / or timing information and / or scheduling information, a set of valid resources can be selected and sorted based on the resource index described above.
  • the list of resource sets is generated in order, and a virtual identifier is assigned from 0 to N for each resource set.
  • N may be determined by the maximum bit size of the DCI field. If the DCI field uses a bitmap, N may be bitmap size-1. If the DCI field uses an index to indicate one resource set, N may be 2 K ⁇ 1. K may be the size of the DCI field.
  • the set of dynamic rate matching patterns may be derived based on the resource set configuration.
  • the set of dynamic rate matching patterns may be derived based on scheduling information (eg, time / frequency domain resources, TRP, which CORESET carries DCI, etc.).
  • scheduling information eg, time / frequency domain resources, TRP, which CORESET carries DCI, etc.
  • Different resource sets can be configured for each CORESET, and different lists can be used for each DCI depending on which CORESET is scheduled.
  • a slot in an active BWP or a slot in an allocable bandwidth or N PRB * K slots may be divided into M grids. M may be indicated individually or in combination.
  • the position of rate matching may be indicated first in the time domain, after which the RE pattern applied in each indicated time domain may be individually indicated. For time domain indication, a set of bitmaps or patterns can be used.
  • rate matching patterns may be configured to minimize configuration overhead.
  • the type of rate matching pattern may be configured as follows.
  • Type 1 Only a frequency domain pattern can be configured on a defined bandwidth.
  • the frequency domain pattern may be in units of one or more RBs.
  • the defined bandwidth may be applied to the bandwidth in which the SS block is located at the center, applied to the initial DL BWP, or indicated based on common PRB indexing.
  • the indicated PRB may be reserved for at least DL in all subframes / slots for which UL is scheduled. If no frequency unit is configured for the frequency domain pattern, a fixed value (eg 4 PRBs) may be used.
  • the frequency unit for the frequency domain pattern may be defined for each frequency domain. For example, in the band below 6 GHz, the frequency unit may be 1 PRB, and in the band above 6 GHz, the frequency unit may be 100 PRB or the overall system bandwidth. In addition, the frequency unit may be configured separately. For example, the frequency unit may consist of 1 PRB, or X PRB or the entire frequency domain.
  • Type 2 Only time domain patterns can be configured on the bandwidth.
  • the time domain pattern may be one or more symbols.
  • the bandwidth can be defined explicitly or implicitly. If the bandwidth is explicitly defined, it may be defined according to any of the following.
  • the bandwidth may be determined based on the center of the SS block.
  • the bandwidth can be determined based on the lowest frequency of the SS block.
  • the bandwidth can be determined based on common PRB indexing from PRB 0.
  • the bandwidth may be determined based on the initial DL BWP (center of the initial DL BWP or the lowest PRB).
  • the bandwidth may be determined based on the configured reference DL frequency.
  • rate matching pattern it may also be indicated whether the rate matching pattern is applied. That is, frequency location and bandwidth can be configured.
  • bandwidth is implicitly defined, it can be defined according to any of the following.
  • the bandwidth may be equal to the initial DL BWP.
  • the bandwidth may be equal to the initial DL BWP + SS block.
  • the bandwidth may be equal to the carrier bandwidth.
  • the bandwidth may be equal to the configured DL BWP.
  • the bandwidth may be fixed in advance for each frequency domain.
  • the bandwidth may be equal to the UE minimum bandwidth for each frequency domain.
  • Bandwidth can be defined for each frequency domain.
  • the bandwidth may be K times the UE minimum bandwidth.
  • the bandwidth may be equal to the UE maximum bandwidth based on the cell defining the reference DL frequency and / or SS block.
  • Type 3 A frequency / time domain pattern can be constructed. Type 3 patterns may be defined by bitmaps of frequency and time. Type 3 patterns can be defined by dense resource allocation in frequency and time. Plural configurations are also possible.
  • Type 4 A frequency time domain pattern and a period or time pattern can be configured. That is, with the type 1/2/3 described above, an additional time pattern can be constructed. Alternatively, another type may be configured in which all configurations are available.
  • Type 1/2 Considering the frequency and time domain configuration including units, the contents of the present invention described in Type 1/2 can also be applied to Type 3/4.
  • the rate matching pattern configuration configured for the UE may include the following.
  • Type indication may indicate any of the types 1 to 3 described above.
  • additional time patterns can be constructed. The additional time pattern can be applied without wrap-around from system frame number (SFN) 0 (ie, always from SFN 0). Alternatively, the temporal pattern can be applied with wrap-around (i.e. starting from absolute SFN 0). Additional frequency patterns can also be constructed. The additional frequency pattern may indicate whether it is applied from PRB 0 or from the indicated frequency position based on common PRB indexing. Alternatively, the type indication may indicate any one of the types 1 to 3 described above.
  • the reference frequency position for applying the bandwidth may also be additionally configured.
  • symbol unit and frequency unit As described above, a default value may be used.
  • the size of the configuration of each rate matching pattern may be determined.
  • LTE-NR coexistence there is an example in which cell-specific signaling is advantageous especially when the resource allocation unit is not sufficient to handle the reserved resource.
  • NB-IoT narrowband internet-of-things
  • NR NR coexist
  • the reserved resource is indicated at the RB level.
  • the PDCCH region of LTE is reserved resource. May be signaled.
  • Bitmap-1 or Bitmap-2 may be configured. If a usage example in which bitmap-1 and bitmap-2 are combined is identified, a combination of bitmap-1 and bitmap-2 may be supported. If only Bitmap-1 is configured, the indicated RB can be applied to all symbols in all slots. If only bitmap-2 is configured, the indicated symbol can be reserved at full frequency.
  • the first resource set is a semi-statically configured reserved resource / rate matching resource set to be rate matched for control signals / data.
  • the second is a resource set that dynamically indicates whether a resource set is rate matched or data is mapped.
  • reserved resources are not used for DL, UL, and measurement, such as LTE resources or resources for future compatibility in LTE-NR coexistence.
  • IMD intermodulation distortion
  • TDM when TDM is used in the NR, it is possible to process resources that are not allocated to the configuration and scheduling of the measurement, and thus inefficiency may occur in terms of periodicity such as CSI-RS and SRS.
  • periodicity such as CSI-RS and SRS.
  • CSI-RS and SRS may be applied for DL and UL, respectively.
  • the resource unit of the semi-static rate matching resource set needs to be flexibly configured to support various usage examples.
  • the resource set may consist of a plurality of symbols on consecutive frequency domains.
  • the frequency domain may be sufficient for a plurality of resource sets to be configured to support discontinuous resources in the time and / or frequency domain.
  • an existing RS configuration eg, periodic, RE configuration, etc.
  • -Reserved resources may be configured in which the UE expects no transmission / reception / measurement to be performed.
  • the unit of resource may be one or more symbols on consecutive PRBs in the frequency domain.
  • Rate matching resources may be configured for each of the DL and the UL.
  • the resource unit or resource configuration may include one or more symbols on consecutive PRBs in the frequency domain, or may include one or more RS configurations (eg, CSI-RS, SRS).
  • one or more resource sets are semi-statically configured, one or more of which may be dynamically instructed for at least multiplexing control signals / data.
  • this dynamically indicated resource set may be referred to as dynamic rate matching resource set type-1.
  • the dynamic rate matching resource set type-1 may be valid only when the scheduled PDSCH partially or completely overlaps with the configured / indicated resource set. More specifically, scheduled. If the PDSCH is TDM with the configured / indicated resource set, the resource set may not affect the physical resource mapping of the PDSCH transmission. When the scheduled PDSCH does not overlap with the configured / instructed resource set, it is necessary to clearly define how to interpret the L1 signaling for PDSCH mapping. In this case, in order to simplify the operation, the bit field for PDSCH mapping may be set to a default value, and the corresponding field may be used as a virtual cyclic redundancy check (CRC) to improve the detection performance of the PDCCH.
  • CRC virtual cyclic redundancy check
  • rate matching may be performed in the indicated resource set on the dynamic rate matching resource type-1, or PDSCH / PUSCH may be mapped to the indicated resource set. It may be desirable to perform rate matching in the indicated resource set. This is because in order for PDSCH / PUSCH to be mapped to the indicated resource set, unnecessary restrictions on RRC configuration, RRC signaling overhead, and additional procedures are required to define which DL resources can be used for PDSCH mapping.
  • FIG. 9 shows an example of rate matching according to an embodiment of the present invention.
  • 9- (a) shows a case where rate matching is performed in the resource set indicated on the dynamic rate matching resource type-1.
  • 9- (a) only a single resource set to which a PDSCH may not be mapped needs to be configured through RRC.
  • FIG. 9- (b) shows a case where the PDSCH is mapped in the resource set indicated on the dynamic rate matching resource type-1.
  • 9- (b) both a resource set to which a PDSCH may not be mapped and a resource set to which a PDSCH may be mapped as a result of PDSCH mapping should be configured. That is, in order for the PDSCH to be mapped in the resource set indicated on the dynamic rate matching resource type-1, it is necessary to further clearly define which resource set is rate matched first.
  • Group common signaling and UE specific signaling may be used as L1 signaling for dynamic rate matching resource type-1. Since different UEs may have different rate matching patterns, it may be desirable to indicate dynamic rate matching resource type-1 through UE specific signaling. If the rate matching resource set includes not only CORESET but also dynamic reserved resources such as RS or beamforming such as CSI-RS, it may be desirable to indicate different rate matching patterns for each UE. In addition, further considering ambiguity, it may be desirable for the scheduling DCI to include information regarding rate matching. That is, DL resources used for PDSCH transmission may be allocated by a single L1 signaling used to schedule a single PDSCH transmission rather than a plurality of L1 signaling.
  • a plurality of resource sets including a combination of resource sets When a plurality of resource sets including a combination of resource sets are configured, it may be considered whether to indicate all configured resource sets or one of the resource sets through a bitmap or the like, minimizing overhead.
  • One resource set of the configured resource set may be indicated.
  • not all combinations of basic resource units may be supported. Accordingly, indicating one resource set among the configured resource sets is more flexible and minimizes overhead.
  • the UE may be configured by UE specific RRC signaling to identify a resource to which the PUSCH may or may not be mapped based on the L1 signaling.
  • the resource set may include PUCCH resources for the same UE or another UE. That is, UE scheduling may be used to indicate one or more resource sets for which the scheduled PDSCH or PUSCH is rate matched.
  • the resource unit of the dynamic rate matching resource type-1 may correspond to any one of the following.
  • the resource allocation of the CORESET level may be configured in consideration of PDCCH candidates, DL / UL traffic amount, PDCCH detection performance, and the like.
  • the amount of DL resources used for the actual PDCCH transmission may be relatively less than the total amount of DL resources associated with CORESET. That is, depending on traffic conditions, the resource allocation of the CORESET level may not completely use the resources available in the CORESET for PDSCH mapping.
  • a part of DL resources of CORESET may be reused for PDSCH mapping according to a configured / instructed resource set.
  • a particular CCE index may be configured with a threshold to identify DL resources available for PDSCH mapping. More specifically, for a given CORESET, if the index of the configured CCE threshold is X, then the scheduled PDSCH may be rate matched around the DL resources associated with the CCE whose index is less than X, instead of all DL resources in the CORESET. Meanwhile, PDCCH transmission of the same UE or another UE may be mapped on a CCE whose index is smaller than X.
  • the resource set may be configured by a combination between CORESET and a threshold. That is, it may be efficient to reuse DL resources in CORESET with reasonable signaling overhead.
  • the dynamic rate matching resource set may also be used for purposes other than multiplexing control signals / data.
  • the dynamic rate matching resource set can be used for dynamic resource reservation / use.
  • the configuration of the dynamic rate matching resource set may not be limited only for the control region. That is, in order to adjust configuration overhead and increase flexibility, the resource unit for dynamic rate matching resource set type-1 is similar to the semi-static rate matching resource set, which can be discontinuous and frequency domain allocation of one PRB / RBG level. It may consist of more than one symbol.
  • a rate matching resource set for RS protection in NR needs to be supported.
  • the resource set dynamically indicated for the RS may be referred to as dynamic rate matching resource set type-2.
  • the biggest difference between the dynamic rate matching resource set type-1 and the dynamic rate matching resource set type-2 is in units of resources.
  • the dynamic rate matching resource set type-1 is sufficient for the RB level configuration, but the dynamic rate matching resource set type- 2 requires configuration of the RE level.
  • the dynamic rate matching resource for the PDSCH may include at least CSI-RS.
  • the PDSCH and the DM-RS may be multiplexed by the FDM scheme
  • signaling for rate matching of the PDSCH in the DM-RS symbol should be supported in the NR in order to protect the DM-RS of another UE. Since the integrated configuration and the signaling are preferable for the rate matching purpose, the configuration of the rate matching resource set for the PDSCH can be supported by the DM-RS as well as the CSI-RS.
  • resources for PUSCH rate matching may be supported.
  • configuration for at least symbol level UL rate matching resource aggregation may be supported for SRS protection.
  • band configuration and RE level configuration for UL rate matching resource set may be considered.
  • hopping of the UL rate matching resource set may also be introduced in consideration of the SRS hopping band.
  • data may not be transmitted in an RE to which a non-zero-power CSI-RS for channel measurement is transmitted, at least for channel measurement performance.
  • the NZP CSI-RS for all configured channel measurements can be considered to be rate matched by default.
  • PDSCH and PUSCH can be rate matched around the RE occupied by some signals important for data transmission / reception. For example, the PDSCH must be rate matched around the scheduled DM-RS and SS blocks, and the PUSCH must be rate matched around the scheduled DM-RS and SRS.
  • FIG. 10 shows another example of rate matching according to an embodiment of the present invention.
  • IMR interference measurement resource
  • FIG. 10 in order to support a plurality of TRP, dynamic indication of IMR is required.
  • a DPS dynamic point selection
  • the UE's operation on the configured RS needs to be clearly defined. That is, the PDSCH may be rate matched around the next resource.
  • NZP CSI-RS configured to UE for channel measurement
  • DM-RS for PDSCH configured for UE
  • the PUSCH may be rate matched around the next resource.
  • the above operation does not require any configuration of a resource set that is dynamically indicated to be rate matched.
  • operations in different time domains of dynamic rate matching resource set type-2 may be considered to process various RS configurations for the UE.
  • aperiodic / semi-persistent / periodic RS can be supported, thus aperiodic / semi-permanent / periodic in the same time domain in NR
  • the operation for the rate matching resource set needs to be defined.
  • the periodic rate matching resource set may be used for the protection of the IMR in the CSI-RS transmitted periodically and coordinated multi-point (CoMP) transmission scenario with intercell interference.
  • CoMP coordinated multi-point
  • Aperiodic rate matching resource set is required for at least aperiodic CSI-RS and IMR.
  • Semi-permanent rate matching resource set may be needed in the case of NZP CSI-RS transmitted semi-permanently in neighboring TRP or beam.
  • An aperiodic rate matching resource set indicated by DCI signaling may be used in every corresponding PDSCH slot for the purpose of a semi-permanent rate matching resource set.
  • the overhead of DCI may be large to indicate a possible combination of all rate matching resource sets including target CSI-RS resources for aperiodic and semi-permanent CSI-RS. This is especially true considering that more than one semi-permanent rate matching resource set in a slot needs to be triggered at the same time (which may be different periods but in the same transmission instance).
  • the aperiodic rate matching resource set needs to be designed with a small DCI payload to dynamically indicate the rate matching resource set.
  • the candidate of the rate matching resource set may be further reduced by a media access control (MAC) control element (CE).
  • the semi-permanent rate matching resource set may be activated / deactivated by the MAC CE.
  • the period and slot offset may be configured by the RRC in addition to the RE pattern information (ie, the RE location in the slot). Since the aperiodic rate matching resource set can be used for dynamic RS protection for the aperiodic CSI-RS of a neighboring UE / TRP, a periodic and slot offset is not necessary for the aperiodic rate matching resource set.
  • the aperiodic rate matching resource set may be triggered by the DCI. Once a plurality of periodic / semi-permanent rate matching resource sets are configured, the periodic / semi-permanent rate matching resource sets may be combined with DCI signaling to select one or more rate matching resource sets among the rate matching resource sets configured by RRC.
  • the PDSCH / PUSCH is configured at the configured periodic or semi-permanent rate. Rate matching can be made around the matching resource set.
  • rate matching resource sets may be supported for RS.
  • Periodic Rate Matching Resource Set The RE pattern (ie RE position in slot), period, and slot offset for rate matching may be configured by the RRC.
  • the PDSCH may be rate matched around the configured resources.
  • the RE pattern ie RE position in slot
  • period ie RE position in slot
  • slot offset for rate matching may be configured by RRC.
  • MAC CE can enable / disable the resource.
  • the PDSCH may be rate matched only around an activated resource among configured resources.
  • Aperiodic Rate Matching Resource Set An RE pattern (ie, dynamic rate matching resource set type-2) for rate matching may be configured by RRC.
  • PDSCH may be rate matched around a resource indicated by DCI.
  • rate matching including a plurality of RS types (eg, CSI-RS, DM-RS, SRS, etc.) may be performed
  • a method of configuring an RE pattern of a rate matching resource set needs to be defined. To this end, the following options may be considered.
  • Option 1 Reuse of configuration parameters indicating RE location for each RS type
  • the RE pattern configuration method of the target RS may be reused as the RE pattern configuration method of the rate matching resource set.
  • the rate matching resource set may be configured through the CSI-RS RE pattern configuration index of the X antenna port. This option is efficient in terms of signaling.
  • candidate parameters for the construction of a rate matching resource set may be as follows.
  • NZP CSI-RS Period pattern and slot offset for RE pattern (e.g. RE location, port number), RB level density, timing behavior (i.e. periodic / semi-permanent / non-periodic), periodic / semi-permanent rate matching resource set
  • DM-RS DM-RS type, DM-RS symbol index and number, code division multiplexing (CDM) group index (especially for type 2), additional DM-RS configuration
  • SRS RE pattern (e.g., RE location, port number), com value, frequency hopping, timing behavior (i.e. periodic / semi-permanent / aperiodic), periodic and slot offset for periodic / semi-permanent rate matching resource set, Band composition
  • the RE pattern of the rate matching resource set can be freely configured.
  • This option may overcome the limitation of option 1 described above.
  • this option requires greater signaling overhead. For example, if a RE level bitmap is used for rate matching resource set configuration, 168 bits are needed to fully support 14 symbols of PRB. This overhead may be further increased if the RE pattern of the rate matching resource set is configured over a plurality of consecutive PRBs. Therefore, this option needs a way to reduce signaling. For example, a rate matching resource set element resource having N adjacent REs, a symbol level rate matching resource set, and a configuration of a rate matching resource set in a limited area may be required.
  • the configured resources for physical resource mapping of the PDSCH transmission may include CORESET / PDCCH of another UE, dynamic reserved resources such as RS of another UE, and resources using different neuralologies. That is, the pattern of the resource set should consider not only CORESET / PDCCH of other UEs but also other resources that the UE cannot use. That is, the DCI indication for rate matching resource set may be used for a plurality of purposes. For simplicity, a single bit field may be used to indicate a combination of rate matching resource sets for multiple uses. In this case, the resource set for dynamic indication of the rate matching resource set may be configured by a combination of a CORESET configuration (in terms of PRB) and a CSI-RS configuration (in terms of RE patterns).
  • a resource set for dynamic indication of a rate matching resource set may take the signaling overhead and be configured at the PRB and / or RE group level.
  • Each candidate of the rate matching resource set may include a resource for the PDCCH and a resource for the CSI-RS.
  • the indication of resources for the PDCCH and the indication of resources for the CSI-RS need to be independent of each other. For example, PDSCH may need to be rate matched around a resource, while PDCCH may be mapped without needing to be rate matched around CSI-RS resources.
  • each candidate of the rate matching resource set may be associated with a rate matching resource set sharing a resource with the PDCCH or a rate matching resource set for RS protection.
  • the following shows several options for incorporating a rate matching resource set.
  • Option 1 Individual fields or indications may be used depending on the resource unit. For example, the dynamic rate matching resource set type-1 and the dynamic rate matching resource set type-2 may be indicated separately from each other.
  • Option 2 Individual fields or indications may be used depending on the symbol on which rate matching is to be performed. For example, one field may be used for a symbol in which a control region exists and another field may be used for data.
  • Option 3 Individual fields or indications may be used depending on the purpose. For example, control signal / data multiplexing and aperiodic IMR indication may use different fields. In addition, if a different set of resources is needed, such as dynamic resource reservation, another separate field can be used.
  • FIG. 11 illustrates a method in which a UE performs rate matching according to an embodiment of the present invention.
  • the contents of the present invention related to the rate matching described above can be applied to this embodiment.
  • the UE receives the configuration for the rate matching UE-specifically or cell-specifically.
  • the configuration includes a plurality of rate matching patterns, and at least one rate matching pattern of the plurality of rate matching patterns may be indicated by dynamic signaling.
  • Each of the plurality of rate matching patterns may include a set of symbols.
  • the configuration may include information on a period and an offset of each of the plurality of rate matching patterns or a bandwidth on which the rate matching is performed.
  • the plurality of rate matching patterns may include a common rate matching pattern applicable to all configured BWPs.
  • the common rate matching pattern may be configured based on reference neuralology.
  • the plurality of rate matching patterns may be configured for each BWP.
  • the plurality of rate matching patterns may be configured based on the neuralology used for each BWP.
  • each of the plurality of rate matching patterns may be configured for each slot and may be repeated in the plurality of slots.
  • step S1110 if the configuration is received UE-specifically, the UE performs the rate matching only for unicast data.
  • step S1120 when the configuration is received cell-specifically, the rate matching is performed on the unicast data and broadcast data.
  • the rate matching pattern may be performed in a slot in which PDSCH or PUSCH is scheduled according to the at least one rate matching indicated by the dynamic signaling.
  • the DM-RS transmitted in the PDSCH or PUSCH may not be affected by a rate matching pattern.
  • the DCI scheduling the PDSCH or the PUSCH may not be affected by the rate matching pattern.
  • the rate matching may be performed on a slot basis or a mini slot basis.
  • FIG. 12 illustrates a wireless communication system in which an embodiment of the present invention is implemented.
  • the UE 1200 includes a processor 1210, a memory 1220, and a transceiver 1230.
  • the memory 1220 is connected to the processor 1210 and stores various information for driving the processor 1210.
  • the transceiver 1230 is connected to the processor 1210 and transmits a radio signal to the network node 1300 or receives a radio signal from the network node 1300.
  • Processor 1210 may be configured to implement the functions, processes, and / or methods described herein. More specifically, the processor 1210 may perform steps S1100 to S1120 in FIG. 11, or control the transceiver 1230 to perform this.
  • the network node 1300 includes a processor 1310, a memory 1320, and a transceiver 1330.
  • the memory 1320 is connected to the processor 1310 and stores various information for driving the processor 1310.
  • the transceiver 1330 is connected to the processor 1310 and transmits a radio signal to or receives a radio signal from the UE 1200.
  • the processor 1310 may be configured to implement the functions, processes, and / or methods described herein.
  • Processors 1210 and 1310 may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, and / or data processing devices.
  • the memories 1220 and 1320 may include read-only memory (ROM), random access memory (RAM), flash memory, memory cards, storage media, and / or other storage devices.
  • the transceivers 1230 and 1330 may include a baseband circuit for processing radio frequency signals.
  • the above-described technique may be implemented as a module (process, function, etc.) for performing the above-described function.
  • the module may be stored in the memories 1220 and 1320 and executed by the processors 1210 and 1310.
  • the memories 1220 and 1320 may be inside or outside the processors 1210 and 1310, and may be connected to the processors 1210 and 1310 by various well-known means.
  • FIG. 13 shows a processor of the UE shown in FIG. 12.
  • the processor 1210 of the UE includes a transform precoder 1211, a subcarrier mapper 1212, an inverse fast Fourier transform (IFFT) unit 1213, and a cyclic prefix inserter 1214.
  • IFFT inverse fast Fourier transform

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Abstract

La présente invention concerne un procédé et un appareil qui permettent de mettre en correspondance un débit dans un système de communication sans fil. Plus spécifiquement, l'invention concerne un procédé de mise en correspondance de débit effectué par un équipement utilisateur (UE), dans une nouvelle technologie d'accès radio (NR), dans diverses circonstances. À titre d'exemple, l'UE reçoit une configuration pour la mise en correspondance de débit, soit de manière spécifique à l'UE, soit de manière spécifique à une cellule, et, si la configuration est reçue de manière spécifique à l'UE, la mise en correspondance de débit n'est effectuée que sur des données de monodiffusion, et, si la configuration est reçue de manière spécifique à la cellule, la mise en correspondance de débit est effectuée sur des données de diffusion et des données de monodiffusion.
PCT/KR2018/005067 2017-05-01 2018-05-02 Procédé et appareil d'attribution de ressources dans un système de communication sans fil WO2018203650A1 (fr)

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CN201880032813.5A CN110651522B (zh) 2017-05-01 2018-05-02 用于在无线通信系统中分配资源的方法和设备
KR1020197032193A KR102234254B1 (ko) 2017-05-01 2018-05-02 무선 통신 시스템에서 자원을 할당하는 방법 및 장치
JP2019560253A JP6883118B2 (ja) 2017-05-01 2018-05-02 無線通信システムにおける資源を割り当てる方法及び装置
US16/609,731 US10951377B2 (en) 2017-05-01 2018-05-02 Method and device for allocating resources in wireless communication system
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KR102234254B1 (ko) 2021-03-31
US20200067676A1 (en) 2020-02-27
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